udpate global setting tests (#20925)

Author: wing328

modules/openapi-generator/src/test/java/org/openapitools/codegen/config/GlobalSettingsTest.java

@@ -2,35 +2,37 @@
 
 import ch.qos.logback.classic.Level;
 import ch.qos.logback.classic.Logger;
+
 import java.util.Properties;
+
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatNoException;
+
 import org.slf4j.LoggerFactory;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
 /**
  * Test class for {@link GlobalSettings}
+ *
  * @author Edoardo Patti
  */
 public class GlobalSettingsTest {
 
-  private static final Object OBJECT = new Object();
-
-  @BeforeClass
-  public void setUp() {
-    ((Logger) LoggerFactory.getLogger(GlobalSettings.class)).setLevel(Level.DEBUG);
-    Properties props = new Properties(2);
-    props.put("test1", OBJECT);
-    props.put(OBJECT, "test2");
-    System.getProperties().putAll(props);
-  }
-
-  @Test
-  public void testNonStringSystemProperties() {
-    assertThat(GlobalSettings.getProperty(OBJECT.toString())).isNotNull();
-    assertThat(GlobalSettings.getProperty("test1")).isNotNull();
-    assertThatNoException().isThrownBy(GlobalSettings::log);
-  }
+    @BeforeClass
+    public void setUp() {
+        ((Logger) LoggerFactory.getLogger(GlobalSettings.class)).setLevel(Level.DEBUG);
+        Properties props = new Properties(2);
+        props.put("test1", 789);
+        props.put(345, "test2");
+        System.getProperties().putAll(props);
+    }
+
+    @Test
+    public void testNonStringSystemProperties() {
+        assertThat(GlobalSettings.getProperty("345")).isEqualTo("test2");
+        assertThat(GlobalSettings.getProperty("test1")).isEqualTo("789");
+        assertThatNoException().isThrownBy(GlobalSettings::log);
+    }
 
 }